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7615735 |
Random number generation using a scattering waveguide
The present invention provides a method and apparatus for random number generation using a scattering waveguide. The apparatus includes a light source for providing coherent light and a scattering...
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7602916 |
Access-protected data carrier
The invention relates to a data carrier having a semiconductor chip ( 5 ) with at least one memory. The memory contains an operating program that is able to perform at least one operation (h). In...
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7593531 |
Methods and systems for transceiving chaotic signals
A digital communication system based on the use of chaotic carriers is disclosed. For each symbol to be sent, the transmitter sends a reference chaotic signal followed by a transformed version of...
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7587049 |
Active stabilization of a one-way QKD system
A one-way stabilized QKD system ( 10 ) that utilizes a control signal (CS) and a quantum signal (QS) that travel the same path through the system from a first QKD station (Alice) to a second QKD...
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7587047 |
Chaos generator for accumulation of stream entropy
A chaos generator for accumulating stream entropy is disclosed. The chaos generator includes a random source coupled to an entropy accumulator that is configurable for generating a binary random...
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7570767 |
Decoupling error correction from privacy amplification in quantum key distribution
An apparatus ( 1 ) and method for decoupling error correction from privacy amplification in a quantum key distribution (QKD 100 ) system includes two or more computer systems ( 102, 108 ) linked...
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7522727 |
Method and apparatus for providing authentication in a communication system
A method includes receiving an authentication request from a mobile station ( 401 ) and determining whether to forward the request to an authentication agent. When it is determined to forward the...
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7512239 |
Protection key for hardware and information management system
A protection key for hardware includes a first storage area configured to store a key data used for permission to use software installed in a information processor, a second storage area configured...
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7496203 |
Quantum-key distribution method between a plurality of users or groups
There is provided a quantum-key distribution method between a plurality of users or groups. A center prepares a predetermined number of entangled states consisting of qubits equal to the number of...
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7492901 |
Single-photon generator and single-photon generating method
A single-photon generator includes an exciton generation part including therein a quantum dot, an excitation part for generating an exciton in the exciton generator part, a recombination control...
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7492900 |
Quantum communication system
A quantum communication system including (a) an emitter configured to emit a plurality of photon pulses in groups of photon pulses, each group of photon pulses emitted over a group time period,...
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7486794 |
Data-processing arrangement comprising confidential data
A data-processing arrangement ( 3 ) comprises a data-handling circuit ( 4 ) and a supply-current circuit ( 8 ) whose dynamic behavior is inherently chaotic in the sense of Lyapunov. The...
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7447386 |
Cascaded modulator system and method for QKD
A cascaded modulator system ( 20 ) and method for a QKD system ( 10 ) is disclosed. The modulator system includes to modulators (M 1 and M 2 ) optically coupled in series. A parallel shift...
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7440570 |
Method and apparatus for remote digital key generation
A method and apparatus that uses tha dynamics of chaotic system for the remote generation of a digital key, for use in any encryption algorithm. After initialization, the dynamics of a chaotic...
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7418099 |
Method and apparatus for performing elliptic curve arithmetic
A method of performing a cryptographic operation on a point in an elliptic curve cryptosystem using an elliptic carve. The method comprises the steps of obtaining information that uniquely...
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7386130 |
Encryption secured against DPA
The encryption device includes a random number generator for generating a random number; and a first selector for selecting one of q fixed values in response to the random number, a second selector...
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7379546 |
Method for XZ-elliptic curve cryptography
Given a set of elliptic curve points defined over a field F(p) and represented in projective coordinate, a method is presented which allows the embedding of data bits in both the X-coordinate and...
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7366299 |
Method for encrypting and decrypting data using derivative equations and factors
A data cryptographer encrypts and decrypts character data of any given length using derivative equations and factors. The use of factors and derivative equations introduces the randomness required...
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7359512 |
Authentication in a quantum cryptographic system
A quantum cryptographic device provides authentication services over the optical (quantum) channel and the public channel. In one implementation, polarizers generate optical pulses that have a...
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7349542 |
Systems, methods and computer program products for encryption and decryption using wavelet transforms
Systems and methods provide encryption and decryption using wavelet transforms over finite fields. The wavelet encryption system and wavelet decryption system include one or more filters that...
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7346166 |
Quantum key distribution system and method using regulated single-photon source
A system and method for quantum key distribution uses a regulated single-photon source to sequentially generate a first photon and a second photon separated by a time interval Δt. The two photons...
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7334131 |
Protected storage of a datum in an integrated circuit
A method for protecting at least one first datum to be stored in an integrated circuit, including, upon storage of the first datum, performing a combination with at least one second physical datum...
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7330550 |
Cryptographic system and method that uses excitation spectroscopy
A cryptographic system includes: a) a light source for generating an excitation light signal; b) a spatial light modulator for encoding the excitation light signal with data; c) a wavelength...
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7295671 |
Advanced encryption standard (AES) hardware cryptographic engine
A cryptographic method and related implements the Rijndael—AES encryption standard. In one improvement, the decryption round keys are generated on a round by round basis from the final Nk round...
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7292693 |
Deterministically generating block substitution tables which meet a given standard of nonlinearity
A method of deterministically generating maximal nonlinear block substitution tables for a predetermined block size is disclosed. The method includes selecting a first generating function and...
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7286670 |
Method and apparatus for chaotic opportunistic lossless compression of data
The present invention is a compression method for compressing digital data. The data is strings of digital values, which can be broken down to a series of 1's and 0's. The present inventive method...
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7284122 |
Cryptographic method for protection against fraud
A cryptographic method of protection against fraud in transactions between an application and an electronic chip of a user. Both the electronic chip and the application compute a certificate (Sp,...
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7269258 |
Cryptographic key, encryption device, encryption/decryption device, cryptographic key management device, and decryption device
A cryptographic key 1 constituted to be freely attachable and detachable to/from a personal computer 2 encrypting and decrypting data by use of a cipher key includes: a pseudo random number...
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7266200 |
Method and apparatus for encryption of data
A method and apparatus for encryption of data are provided, in which the data is made up of a series of data items ( 600 ). The data items ( 600 ) maybe bytes of data or blocks of data. The method...
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7251325 |
Public key cryptosystem using finite non abelian groups
The present invention relates to a method of encryption and decryption comprises the steps of: selecting a generator and a first element of a first non abelian group, respectively, computing a...
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7248696 |
Dynamic system bus encryption using improved differential transitional encoding
The present invention provides data encryption for a differential bus employing transitional coding. The present invention maps, encodes and encrypts input data as a logic status for a given bus...
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7245723 |
Chaotic communication system and method using modulation of nonreactive circuit elements
A chaotic communication system employs transmitting and receiving chaotic oscillating circuits. One improvement to first-generation systems is the ability to modulate a nonreactive element in the...
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7242775 |
Optical pulse calibration for quantum key distribution
Methods and systems for generating calibrated optical pulses in a QKD system. The method includes calibrating a variable optical attenuator (VOA) by first passing radiation pulses of a given...
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7236597 |
Key transport in quantum cryptographic networks
Methods, apparatus, and systems are provided for distributing a key between nodes. The nodes are provided separate links for carrying messages versus keying information or material. The links for...
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7236594 |
Random generator description
A pseudo random generator comprising a shift register comprising a first flip flop (F 0 ) and n further flip-flops (F 1 . . . Fn) each flip-flop (F 0 ) having a D input, a non-inverting output, an...
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7215776 |
Method and apparatus for the compression and decompression of audio files using a chaotic system
A system for the compression and decompression of sections of audio files is provided. A library of basic waveforms is produced by applying selected digital initialization codes to a chaotic...
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7191340 |
Generation of a secret quantity based on an identifier of an integrated circuit
A method and a circuit for generating a secret quantity based on an identifier of an integrated circuit, in which a first digital word is generated from a physical parameter network, and this first...
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7178277 |
Quantum cryptography communication system and quantum cryptography key distributing method used in the same
A quantum cryptography communication system includes a first data communication unit; a second data communication unit connected with the first data communication unit by a first optical fiber; and...
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7174019 |
Cipher generating device, cipher decoding device, cipher generating program, cipher decoding program, authentication system and electronic device
Encryption, having sufficient concealment, is carried out through chaotic computation using integer arithmetic. There is provided a cipher generating device, for carrying out computation, for plain...
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7170997 |
Method of generating pseudo-random numbers in an electronic device, and a method of encrypting and decrypting electronic data
A method of performing numerical computations in a mathematical system with at least one function, including expressing the mathematical system in discrete terms, expressing at least one variable...
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7133522 |
Method and apparatus for encryption of data
A method for encryption and decryption of data items is provided by defining a cipher key based on variables in a Chaotic Equation. The method includes selecting a Chaotic Equation ( 110 ) from a...
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7113598 |
Methods and systems for high-data-rate quantum cryptography
Methods and systems enabling enhanced bit-rate QKD fiber-based key delivery. In one embodiment, a secure communications network of this invention includes a number of communication nodes, each of...
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7110547 |
Method and apparatus for the compression and decompression of image files using a chaotic system
A system for the compression and decompression of image files is provided. A library of basic waveforms is produced by applying selected digital initialization codes to a chaotic system. Each basic...
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7106864 |
Chaos-based data protection using time-discrete dynamical systems
In an encryption/decryption system for converting data signals between an unencrypted plaintext format and an encrypted ciphertext format plurality of round modules are provided permitting a...
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7076065 |
Chaotic privacy system and method
Systems and methods for protecting privacy in transmitting an analog information signal. The present invention combines the information signal with an analog random signal generated by a chaotic...
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7072469 |
Devices for emitting or receiving signals encrypted by deterministic chaos, and a transmission system, in particular a radio transmission system, including such devices
A sender device for sending an encrypted signal, the device comprising a chaos generator producing an encrypted electrical signal and a feedback loop comprising delayline-forming means, non-linear...
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7054446 |
Chaos cryptographic communication method and chaos cryptographic communication system
Each of plural CPUs enciphers a plaintext code which is a secrecy object according to chaos block encryption and then enciphers it according to chaos stream encryption. Then, it transmits an...
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7050581 |
Method for making secure one or several computer installations using a common secret key algorithm, use of the method and a computer system utilizing the method
The invention relates to a method for protecting one or more computer systems using the same secret key (Ks) cryptographic algorithm, characterized in that the way in which said calculation is...
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7035411 |
Encryption method and apparatus encrypting and adding signature information to qubits
Arbitrary quantum information is input. The information of a quantum two-state system is acquired as a qubit by performing a computation in consideration of a physical system. The acquired qubit is...
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7010126 |
Method for synchronizing a plurality of chaotic systems and method for multichannel communication using synchronized chaotic systems
The present invention relates to a vertical synchronizing method and a horizontal synchronizing method of a plurality of chaotic systems and also relates to a method for multichannel communication...
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